GJP decryption

decrypt.php

<?php

$gjp = "your_encoded_gjp_here";

$gjpdecode = str_replace("_", "/", $gjp);
$gjpdecode = str_replace("-", "+", $gjpdecode);
$gjpdecode = base64_decode($gjpdecode);

class XORCipher {
    public static function cipher($plaintext, $key) {
        $key = self::text2ascii($key);
        $plaintext = self::text2ascii($plaintext);

        $keysize = count($key);
        $input_size = count($plaintext);

        $cipher = "";

        for ($i = 0; $i < $input_size; $i++)
            $cipher .= chr($plaintext[$i] ^ $key[$i % $keysize]);

        return $cipher;
    }

    private static function text2ascii($text) {
        return array_map('ord', str_split($text));
    }
}

$decrypted_text = XORCipher::cipher($gjpdecode, 37526);

echo "Decrypted Text: " . $decrypted_text . "\n";

?>